Lubricating arrangement for gearing



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A. ROSS LUBRICATING ARRANGEMENT FOR GEARING Filed May 28, 1923 3 Sheets-Sheet 2 Ross,

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A. A. ROSS LUBRICAT-ING ARRANGEMENT FOR GEARING 5 Sheets-Sheet 5 Filed May 28, 1923 4 14 IA'N Ross His Attovney.

Patented Dec. 14, 192e.

UNITED "STATES relatar PATENT A carica.'

UBEEY A.' BOSS, OF SGHENECTADY, INEWT YORK, ASSIGNOR T0 GENERAL ELEGTBC i COMPANY, AYGOBPQBATION F NEW YORK. v

,nunnrcarma annanenunnr non enana-1ro.

Application led May 28,

'lhe present invention relates to gearing of the spo-termed self-lubricating or selfoiling type, that is, a gearing wherein the means tor effecting lubrication of the gear- 5 ing is operated by and forms in substance a art o the gearing unit, and has for its 'obJect to provide an improved construction and arrangement in a gearing of this y character. lo For a consideration of what l believe to be novel and my invention, attention is directed to the accompanying description .and

the claims appended thereto.

ln the drawing, Fig. 1 is a plan view of a gearing embodying my invention; Fig. 2 is a transverse sectional view; Fig. 3 is a side elevation with the casing partly broken away; Fig. #l is an end elevation; Fig. d is a detail sectional view of a pressure relief 29 valve Fig. 5 is a transverse sectional view ot a modification, and Fig. 6 is a longitudinal sectional view thereof.

Referring rst to Figs. 1 tot inclusive, y 16 indicates the lower portion of a gear cas- @d ing and 11 the cover or top portion. Ex-

tending across the central portion of the cas ing is a web 1,2 which forms a support for bearings 13' and 'mounted in bearing 13 and adjacent cooperating bearings 1li in the end l@ walls ot'the casing is a high speed shalt 15 which carries a pinion 16 and a low speed shalt 1'? which carries 'a gear wheel 18. .lournaled in theA end walls ot the casing in suitable bearings 19 are shafts 20 upon which are mounted high speed gear wheels 21 and low speed pinions' 22 for transmiting power between pinion 16 and gear wheel 18, thus forming a double reduction gearing. This gearing arrangiament maybe taken as typical of anysuita which my invention may be applied. i According to the embodiment of my invention illustrated in Figs. 1 to d inclusive, l provide in the bottom of the gear casing at .45 one endth'ereof suitable walls 25 which deline a lubrication chamber 26 and which present a to lat surface upon which is mounted a lu ricating pump 27. Preferably l employ a rotary pump a hewn t e of.l gear pump being illustrated. It comprises shafts l 28 and 29 on which are arranged meshing gear wheels located in the pump casing which perform the pumping operation in the .well understood manner. The suction in- 5,5 let to thepump is indicated at 30 and the disle gearing to 1928. Serial No. 641,898.

vcharge conduit at Suction inlet 30 connects directly with lubricating chamber 26.

the level being indicated by the dotted lines A in Figs. 2 and 4 and chamber 26 is kept lled from this supply through an opening` 32 in which is arranged. a strainer l33. lDischarge conduit V31 is connected by a pipe 34: to a passage 35 formed by suitable walls integral with walls 25. .Passage 35 is inside chamber 26 but does not 'connect therewith. The lower end of passage 35 connects with an opening 36 in an end wall of the gear casing and this opening is connected by a passage 37 with a conduit 38 which extends from end to end of the gear casing. Fassage 37 is formed in a plate 39 which is bolted to the end wall of the casing. Conduit 38 is dened by a wall l0 formed integral with the bottom of the gear casing. lt will thus be seen that when lubricant pump 27 is running it takes lubricant from chamber 26 and supplies it to conduit 38. From conduit 38 lubricant is supplied to the various parts requiring lubrication. At its two ends it is connected by vertical pipes 4:1 to lubricant passages 42 which extend alon the ends ot the casing and supply lubricant through passages 13 to the bearings located in the enda walls and vthrough pipes 4l to spoon oilers 45 which lubricate the gear teeth. Passages d2 and a are preferably formed directly in the casing wall, being located directly beneath the bearing hubs in a thickened portion of the casing. They may be in the form of pipes cast directly' in the end walls. At their ends the walls forming passages 42' are provided with danges 46110 which at the one end are bolted the elbows 46 on pipes 44, and at the other end cover plates 47. 'Pipes 41am located outside the gear casing as shown in Fig. 3, the left hand .pipe being detachably connected to the gear casing by a removable plate 48 khaving a passage 49therein which connects the pipe to conduit 38, and the right hand pipe-beingconnected to detachable plate 39 whichv is provided with a passage() coninfectingy the pipe'to conduit 38. At 51 (Figs. l and 2) is a pipe which j conveys lubricant from conduit 38'to the middle bearings 13 `.eupported on web 12. In plate 48 is a by=pass conduit 48l which connects passage 49 to the gear casing beyond conduit -38 and' is non' mally closed by a spring pressed valve 48b (see Fig. 4). In case of excess pressure in the lubricating system valve 48b is forced open to permit escape of lubricant through by-pass conduit 48a to the gear casing. In pipes 44 are sight flow indicators 52 for indicating flow of lubricant to the spoon Oilers and at 53 is a gauge which shows the lubricant level in the gear casing.

The lubricant pump 27 is driven from the gearing, preferably the low speed shaft, and to this end a gear wheel 54 is fixed on the end of pump shaft 28 and meshes directly with low speed gear wheel 18. With this arrangement whenever the gearing is running, the lubricant pump is operated to supply lubricant to the various parts requiring lubrication.

Fastened to the inner surface of cover 11 by one or more suitable straps 55 isa cooling Coil 56 provided with admission and discharge pipes 57. .Cooling medium such as water is circulated through this coil.y

In operation, whenever the gearing is running the lubricant pump is driven to supply oil from chamber 26 to the bearings and the Spoon oilers 45. The spoon oilers supply oil to the right hand side of the gearing at which point the gear wheels 18 and 22, turning in the directions of the arrows, move up-y ward. The oil from these gear wheels is thrown upward inthe form of a fine spray into engagement with the cooling coil 56 from which it drops back into the bottom of the casing, a part of it falling on the left hand portion of the gearing to lubricate it.

The gearing is thus thoroughly lubricated` andthe lubricant cooled. Since the lubricant pump is submerged in the supply of lubricant, it is always primed and ready to operate. f

In Figs. 5 and 6 I lhave shown my invention in connection with. a single reduction gearing comprising a pinion 60 mounted on a shaft 61 and meshing wit-h a gear wheel 62 to a pipe 71 which conveys lubricant to passages 72 which lead to the bearings and to a spoon oiler 73.l At 74 is a return pipe for conveying the excess lubricant back to the gear casing, there being a suitable pressure relief valve therein indlcated at 75. At 77 is a cooling coil which performs the same function as does the coil 56 in Figs. 1 to 4 and at'78 isa liquid level indicator for the lubricant in the gear casing.

In this' arrangement the lubricant pump 66 is driven from the low speed shaft 63 by a small gear Wheel 79 which is mounted on shaft 63 and drives the pump through an idler gear wheel 8O and a gear wheel 81 mounted on one of the ,pump shafts.

The operation of the arrangement shown in Figs. 5 and 6 is similar to that of the ar` rangement of Figs. 1 to 4, the pump being submerged so it is self-priming and operatin@r whenever the gearing is running.

y my invention I provide a self-oiling gearing which is simple in structure, compact, and in which a positive pump means is provided for forcing lubricant to the parts requiring lubrication.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the apparatus Shown is only illustrative and that the invention may be carried out by other means.

That I claim as new and desire to secure by Letters Patent of the United States, is

1. In a gearing, the combination of a casing adapted to contain a supply of lubricant in the bottom thereof, intermeshing gear wheels mounted in the casing above the lnbricant level, bearings for the gear Wheels, a

lubricant pump mounted in the casing belowv the lubricant level with its suction side communicating with the interior of the casing below the lubricant level, means for delivering lubricant from the discharge side of the pump to the bearings and to the meshing teeth of the gear Wlheels, means within the casing for ellecting cooling of the lubricant, the point of application of lubricant to the gear wheels being such that it is directed therefrom by rotation against the cooling means and a gearing for driving the pump directly from one of the gear w eels.

2. In a gearing, the combination-of a casing adapted to contain a supply of lubricant in the bottom thereof, intermeshing gear wheels mounted in the casing above the lubricant level, bearings for the gear Wheels, walls supported on the bottom of the casing which form a chamber communicating with the casing interior below the lubricant level, a lubricant pump mounted on said walls and having its suction side connected with said chamber, means for delivering lubricant from the dischar e side of the pump to the bearings and against theintermeshin gear wheels, the rotation of the latter serving to set up a spray of lubricant, and means for effecting cooling of the lubricant located in the path of the spray.

3. In a gearing, the combination of a casing adapted to contain a supply of lubricant in the bottom thereof, intermeshing gear wheels mounted in the casing above the lubricant level, bearings for the gear wheels, walls supported on the bottom of the casing whichv form a chamber communicating with contain lubricant, a gearing mounte there-I the casing interior below the lubricant level,

a lubricant pump mounted on said walls and tion, and means for effecting cooling of the lubricant located in the path of the spray.

4. In combination, a casing ada te to in, said gearing being arranged to create a spray of lubricant when 1n operation, a lubricant pump mounted on the bottom of the casing and having its suction side communicating directly with vthe casing, means forming conduits which connect the discharge side of said' pump to points inthe gearing requiring lubrication, means for drivin@r said pum from said gearing and meanlsD within saild casing above the,

lubricant level and in the path of the lubri-y canty spray for effecting cooling ofthe lubricant.

5. In a self-oiling gearing, the combination with a casing and power transmitting gear wheels therein, of walls supported on the bottom of the casing which form a cham-- ber which communicates with the casing, a lubricant pump mounted on said walls and having its suction side connected to saidv chamber, walls forming a conduit which extendsacross the casing, a conduit connecting the discharge side of the pump to said firstnamed'conduit, a pressure relief valve for said first-named conduit which is connected therewith to discharge into the casing, means for driving the pump directly from the gear wheels, and means forming passages for conveying lubricant from said first-named conduit to parts requiring 1ubrication.

In witness whereof, I have hereunto set 5 da of May, 1923.

my hand this 26th A REY A. Ross. 

